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test-sha1: add a binary output mode

The test-sha1 helper program will run our internal sha1
routines over its input and output the 40-byte hex sha1.
Sometimes, however, it is useful to have the binary 20-byte
sha1 (and it's a pain to convert back in the shell). Let's
add a "-b" option to output the binary version.

Signed-off-by: Jeff King <peff@peff.net>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent a3bc3d0 commit 54c93cb4afc932ab125a59464bb52e04f9c36575 @peff peff committed with gitster Aug 22, 2013
Showing with 12 additions and 3 deletions.
  1. +12 −3 test-sha1.c
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@@ -5,10 +5,15 @@ int main(int ac, char **av)
git_SHA_CTX ctx;
unsigned char sha1[20];
unsigned bufsz = 8192;
+ int binary = 0;
char *buffer;
- if (ac == 2)
- bufsz = strtoul(av[1], NULL, 10) * 1024 * 1024;
+ if (ac == 2) {
+ if (!strcmp(av[1], "-b"))
+ binary = 1;
+ else
+ bufsz = strtoul(av[1], NULL, 10) * 1024 * 1024;
+ }
if (!bufsz)
bufsz = 8192;
@@ -42,6 +47,10 @@ int main(int ac, char **av)
git_SHA1_Update(&ctx, buffer, this_sz);
}
git_SHA1_Final(sha1, &ctx);
- puts(sha1_to_hex(sha1));
+
+ if (binary)
+ fwrite(sha1, 1, 20, stdout);
+ else
+ puts(sha1_to_hex(sha1));
exit(0);
}

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